Valve unit with axial pressure medium inlet

A pressure medium and valve element technology, applied in the field of valve units with axial pressure medium inlets, can solve the problems of dirt particle intrusion and obstruction of valve piston movement, etc., and achieve the effect of simple and cheap design scheme

CN104334841AInactive Publication Date: 2015-02-04SCHAEFFLER TECH AG & CO KG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-02-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

A valve element for a hydraulic control device, in particular valve sleeve (1) or valve housing for a control valve on internal combustion engines or transmissions of motor vehicles, wherein the valve element has a displaceable control piston (2) which is subjected to load on one side by a spring (3) which is supported on a spring bearing (4) which is fixed to the valve element, wherein the spring bearing (4) has at least one opening (7) which is connected to a pressure medium line, and wherein the pressure medium line is in the form of a pressure medium inlet line and an axial filter (8) is arranged on the opening (7) of the spring bearing (4) and / or the opening (7) on the spring bearing (4) is provided with a check valve (9).
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Description

technical field

[0001] Valve element for a hydraulic control device, in particular for a valve sleeve or valve housing of a control valve in an internal combustion engine or transmission of a motor vehicle, wherein the valve element has a displaceable control piston which is supported on one side by means of a spring For loading, the spring is supported on a spring support fixed to the valve element, wherein the spring support has at least one opening forming a connection with the pressure medium line. Background technique

[0002] Such a valve element configured as a valve sleeve is known from DE 10 2007 058 491 A1. The valve element is a component of a control valve for variably adjusting the timing of gas exchange valves of a reciprocating piston internal combustion engine. The valve element is screwed into the hollow camshaft at the end and, in conjunction with the control piston, controls the pressure medium inflow, the control line to the camshaft adjustment unit and ...

Examples

Embodiment Construction

[0022] exist Figure 1 to Figure 5 shows in detail generally the valve housing designated 1 in which the control piston 2 is arranged and designed to be axially displaceable. The control piston 2 is operatively connected to a spring 3 supported on a spring support 4 . The spring support 4 has a projection 5 which corresponds to the groove 6 on the inner wall of the valve housing 1 and thus ensures a firm hold in the valve housing 1 . The spring carrier 4 is made of an elastic material, in particular plastic, which is preferably produced according to the injection molding method. As a result, the spring support 4 can be moved and snapped into the central opening of the valve sleeve 1 , so that simple assembly is possible and a good fixation of the spring support 4 in the valve sleeve 1 is obtained.

[0023] according to figure 1 , in the opening 7 of the spring support 4 is fitted an axial filter 8 which prevents the penetration of dirt particles into the area of ​​the contr...